CN107481676A - A kind of driving method of image element circuit, display panel and display device - Google Patents
A kind of driving method of image element circuit, display panel and display device Download PDFInfo
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- CN107481676A CN107481676A CN201710937938.XA CN201710937938A CN107481676A CN 107481676 A CN107481676 A CN 107481676A CN 201710937938 A CN201710937938 A CN 201710937938A CN 107481676 A CN107481676 A CN 107481676A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
- G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0262—The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
Abstract
The embodiment of the invention discloses a kind of driving method of image element circuit, display panel and display device.The image element circuit includes Data write. module, driving transistor, keeps module and light-emitting component；The period is shown in a frame, the driving method includes：Data write phase, the Data write. module write data-signal the grid of the driving transistor；Glow phase, the grid voltage for keeping module to keep the driving transistor, the driving transistor provide driving current to the light-emitting component, and the light-emitting component responds the driving current and lighted；Turn off phase, the driving transistor work in completely switched off region.Technical scheme provided in an embodiment of the present invention, the characteristic drift degree of driving transistor is reduced, the display effect of display picture can be improved.
Description
Technical field
The present embodiments relate to display technology field, more particularly to a kind of driving method of image element circuit, display panel
And display device.
Background technology
OLED compares liquid crystal display, and Organic Light Emitting Diode has low energy consumption, production cost low, spontaneous
The advantages that light, wide viewing angle and fast response time, at present, it is widely used in display fields such as mobile phone, PDA, digital cameras.
The pixel that each pixel of OLED includes Organic Light Emitting Diode and drives organic light-emitting diode to show
Circuit.
Image element circuit generally comprises a driving transistor, several switching transistors and storage capacitance.Due to technique system
The reason such as journey and device aging, the characteristic of the driving transistor in image element circuit corresponding to each pixel is drifted about, such as threshold value
Voltage drift, and driving transistor typically works long hours in subthreshold region, also easily causes the characteristic of driving transistor
Drift about, after the characteristic of driving transistor is drifted about, characteristic curve can be distorted, the not necessarily weight completely after overcompensation
Close, so the characteristic deviation degree of different driving transistor is different, it may appear that the problems such as brightness irregularities (mura) and ghost,
So as to influence the display effect of whole image.
The content of the invention
The present invention provides a kind of driving method of image element circuit, display panel and display device, to reduce driving crystal
Pipe characteristic drift degree, characteristic curve registration after compensation is improved, reduce and show mura, improve display effect.
In view of this, the embodiments of the invention provide a kind of driving method of image element circuit, wherein, the image element circuit bag
Include Data write. module, driving transistor, keep module and light-emitting component；
The period is shown in a frame, the driving method includes：
Data write phase, the Data write. module write data-signal the grid of the driving transistor；
Glow phase, the grid voltage for keeping module to keep the driving transistor, the driving transistor is to institute
State light-emitting component and driving current is provided, the light-emitting component responds the driving current and lighted；
Turn off phase, the driving transistor work in completely switched off region.
The embodiment of the present invention also provides a kind of display panel, including multiple image element circuits being arranged in array, image element circuit
Including Data write. module, driving transistor, keep module and light-emitting component；
Display panel includes：
Blanking voltage generation module, for producing blanking voltage and transmitting to the grid of driving transistor, controlling transistor
Work in completely switched off region；
Scanning signal generation module；Exported for scanning signal will to be produced to scan line, the conducting of control data writing module；
Data-signal generation module, for producing the data-signal of corresponding image signals and exporting to data wire, so that number
The grid of the driving transistor is write by the Data write. module of conducting according to the data-signal on line, control driving is brilliant
Body pipe provides driving current to the light-emitting component and drives the light-emitting component to light.
The embodiment of the present invention also provides a kind of display device, including above-described display panel.
The present invention implements driving method, display panel and the display device of the image element circuit provided, due in cut-off rank
Section, driving transistor work in completely switched off region.That is, in a frame time of display, driving transistor is in part
Time (corresponding turn off phase) works in completely switched off region so that driving transistor bias degree is relatively low, can reduce driving
The characteristic drift degree of transistor, characteristic curve degreeof tortuosity is reduced, reduce and show mura, improve the display effect of display picture
Fruit.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet of the driving method of image element circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of drive transistor characteristics curve comparison figure provided in an embodiment of the present invention；
Fig. 3 is a kind of structure chart of image element circuit provided in an embodiment of the present invention；
Fig. 4 is a kind of driver' s timing figure provided in an embodiment of the present invention；
Fig. 5 is another drive transistor characteristics curve comparison figure provided in an embodiment of the present invention；
Fig. 6 is another driver' s timing figure provided in an embodiment of the present invention；
Fig. 7 is another driver' s timing figure provided in an embodiment of the present invention；
Fig. 8 is another driver' s timing figure provided in an embodiment of the present invention；
Fig. 9 is a kind of circuit diagram of image element circuit provided in an embodiment of the present invention；
Figure 10 is a kind of structural representation of display panel provided in an embodiment of the present invention；
Figure 11 is a kind of structural representation of display device provided in an embodiment of the present invention.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Fig. 1 is a kind of schematic flow sheet of the driving method of image element circuit provided in an embodiment of the present invention, wherein, pixel electricity
Road includes Data write. module, driving transistor, keeps module and light-emitting component；
Referring to Fig. 1, the period is shown in a frame, driving method includes：
S110, data write phase, Data write. module is by the grid of data-signal write driver transistor.
S120, glow phase, keep module to keep the grid voltage of driving transistor, and driving transistor carries to light-emitting component
For driving current, light-emitting component lights in response to driving current.
S130, turn off phase, driving transistor work in completely switched off region.
In data write phase, Data write. module is by the grid of data-signal write driver transistor；In glow phase,
The voltage for the data-signal that driving transistor writes according to its grid produces corresponding driving current, the luminous member of driving current driving
Part luminescence display.Meanwhile keep module keep driving transistor grid voltage, driving transistor persistently produce driving current with
Drive light-emitting component continuous illumination.In data write phase and glow phase, driving transistor general work is in subthreshold region.
And work in completely switched off region in turn off phase, control driving transistor.Driving transistor can be N-type transistor or P
Transistor npn npn；If driving transistor is N-type transistor, control driving transistor works in completely switched off region, then drives crystal
The grid and source voltage difference of pipe need the negative value less than its threshold voltage；If driving transistor is P-type transistor, control driving
Transistor works in completely switched off region, and the grid and source voltage difference of driving transistor need bearing more than its threshold voltage
Value.Such as threshold voltage be -3.527V p-type driving transistor, then will the driving transistor work in completely switched off area
Domain, the grid and source voltage difference of driving transistor can be 4V.
Technical scheme provided in an embodiment of the present invention, because in turn off phase, driving transistor works in completely switched off area
Domain.That is, in a frame time of display, driving transistor is worked in and cut completely in part-time (corresponding turn off phase)
Only region so that driving transistor bias degree is relatively low, can reduce the characteristic drift degree of driving transistor, and it is bent to reduce characteristic
Line degreeof tortuosity, reduce and show mura and ghost, improve the display effect of display picture.Exemplarily, referring to Fig. 2, Fig. 2 is this
A kind of drive transistor characteristics curve comparison figure that inventive embodiments provide.Wherein, the first characteristic curve 201 can represent that driving is brilliant
The primary characteristic curve of body pipe, the second characteristic curve 202 can represent the characteristic curve after the drift of driving transistor occurrence features, the
Three characteristic curves 203 can represent that driving transistor part-time (turn off phase) works in the characteristic curve in completely switched off region.
It can be seen that driving transistor part-time is worked in after completely switched off region, the characteristic drift journey of the 3rd characteristic curve 203
Degree decreases relative to the characteristic drift degree of the second characteristic curve 202, i.e., driving transistor part-time works in completely
Cut-off region, the characteristic drift degree of driving transistor is reduced, reduce and show mura, the display effect of display picture can be improved
Fruit.
It should be noted that in the flow chart shown in Fig. 1, turn off phase is located at after glow phase.Of the invention real
In the other embodiment for applying example, turn off phase can be located at before glow phase.Also can before glow phase, and glow phase it
After be respectively provided with turn off phase, when being provided with multiple turn off phase, can show that period in multiple stages make driving brilliant in a frame
Body pipe works in completely switched off region so that and driving transistor bias degree further reduces, and reduces the drift of driving transistor,
Characteristic misaligned degree is reduced, reduces and shows mura, improves display effect.
Ratio of the turn off phase in a frame shows the period is more than zero and less than or equal to 5%.Due in turn off phase,
Driving transistor works in completely switched off region, and driving transistor does not produce driving current driving light-emitting component luminescence display.One
As a frame show the period duration fix, if the time of turn off phase is longer, can cause light-emitting component luminous duration deficiency,
It is possible that display dark-state, and ratio of the turn off phase in a frame display stage is more than zero and less than or equal to 5%, you can
The drift of driving transistor is reduced, reduces and shows mura, ensure that the brightness of display.
Fig. 3 is a kind of structure chart of image element circuit provided in an embodiment of the present invention, and referring to Fig. 3, image element circuit also includes hair
Optical element 11, driving transistor 12, reseting module 13, threshold value compensation module 14, Data write. module 15, keep module 16, the
One light emitting control module 17 and the second light emitting control module 18；
Wherein, the control terminal of Data write. module 15 electrically connected with the first scan line S1, first end and data wire data electricity
Connection, the second end electrically connect with the first pole of driving transistor 12；Namely electrically connected with section point N2.
The control terminal of threshold value compensation module 14 electrically connects with the first scan line S1, the second of first end and driving transistor 12
Pole electrical connection, the second end electrically connect with the grid of driving transistor 12；
The first end of module 16 and the grid of driving transistor 12, namely first node N1 electrical connections are kept, keeps module
16 the second end electrically connects with the first level signal line PVDD；
The control terminal of first light emitting control module 17 electrically connects with the first luminous signal line Emit1, first end with first electricity
Flat signal wire PVDD electrical connections, the second end electrically connect with the first pole of driving transistor 12；
The control terminal of second light emitting control module 18 electrically connects with the first luminous signal line Emit1, first end and driving are brilliant
The second pole electrical connection of body pipe 12, the second end electrically connect with the first pole of light-emitting component 11；
The control terminal of reseting module 13 electrically connects with the second scan line S2, first end and three level signal line Vref3 are electric
Connection, the second end electrically connect with the grid of driving transistor 12；
Second pole of light-emitting component 11 electrically connects with second electrical level signal wire PVEE；
Driving method provided in an embodiment of the present invention also includes reseting stage, and in reseting stage, reseting module 13 turns on, the
The grid of reset signal write driver transistor 12 on three level signal line Vref3；
In data write phase, reseting module 13 turns off, and Data write. module 15 and threshold value compensation module 14 turn on, with drive
The voltage of the threshold voltage association of dynamic transistor 12 is kept module storage；
In glow phase, the first light emitting control module 17 and the second light emitting control module 18 are turned on, and driving transistor 12 is produced
Raw driving current is transmitted to light-emitting component 11, the luminescence display of light-emitting component 11.
Exemplarily, Fig. 4 is a kind of driver' s timing figure provided in an embodiment of the present invention.With reference to Fig. 3 and 4, with module
Control terminal input high level when module turn on, module turns off during the control terminal input low level of module, such as reseting module 13
Control terminal input high level when, reseting module 13 turns on；Driving transistor 12 is that P-type transistor is of the invention real to illustrate
The detailed process of the driving method of the image element circuit of example offer is provided.
In the t1 stages, t1 stages namely turn off phase, the hair of luminous signal write-in first on the first luminous signal line Emit1
The control terminal of the control terminal of photocontrol module 17 and the second light emitting control module 18, the first light emitting control module 17 and second are luminous
Control module 18 turns on, the grid of the first level signal write driver transistor 12 on the first level signal line PVDD.Second
The control terminal of scanning signal write-in reseting module 13 on scan line S2, reseting module 13 turn on, three level signal line Vref3
On three level signal write driver transistor 12 grid, it can be seen that on three level signal line Vref3 the 3rd electricity
Ordinary mail number is high level signal, and the signal on this stage three level signal line Vref3 is blanking voltage signal, the 3rd level letter
Voltage on the voltage and the first luminous signal line Emit1 of signal on number line Vref3 makes driving transistor 12 work in completely
Cut-off region.
In the t2 stages, t2 stages namely reseting stage, the constant conduction of reseting module 13, on three level signal line Vref3
Three level signal be low level signal, this stage, the three level signal on three level signal line Vref3 is believed to reset
Number, the voltage of the first end of grid voltage and holding module 16 to driving transistor 12 initializes.
In the t3 stages, t3 stages namely data write phase, reseting module 13 turn off, the scanning letter on the first scan line S1
The grid of number write-in threshold value compensation module 14, threshold value compensation module 14 turns on, the scanning signal write-in number on the first scan line S1
According to the control terminal of writing module 15, Data write. module 15 turns on, and the data-signal on data wire data passes sequentially through data and write
Enter the grid of module 15, driving transistor 12 and the write driver transistor 12 of compensating module 14, namely first node N1, driving is brilliant
The grid voltage of body pipe 12, namely first node N1 voltage gradually rise, until driving transistor 12 turns off, if data wire
The magnitude of voltage of data-signal on data is Vdata, when driving transistor 12 turns off, the grid voltage of driving transistor 12, i.e.,
First node N1 voltage V1=Vdata+Vth, wherein VthFor the threshold voltage of driving transistor 12.
Stage after t3, also referred to as glow phase, the signal on the first scan line S1 are high level, Data write. module 15
Turned off with threshold value compensation module 14, the luminous signal on the first luminous signal line Emit1 writes the first light emitting control module 17
The control terminal of control terminal and the second light emitting control module 18, the first light emitting control module 17 and the second light emitting control module 18 are led
It is logical, the leakage current I of driving transistor 12d, that is, drive current through the second light emitting control module 18 driving light-emitting component 11 and light,
To realize the display function of display panel.Driving current IdMeet below equation：
Wherein, μ is the carrier mobility of driving transistor 12, and W, L are the width and length of the raceway groove of driving transistor 12,
CoxFor the gate oxide capacitance amount of the unit area of driving transistor 12.VPVDDFor the first level on the first level signal line PVDD
The magnitude of voltage of signal, also it is section point N2 magnitude of voltage.It can be seen that driving current I caused by driving transistor 12dWith drive
The threshold voltage V of dynamic transistor 12thIt is unrelated.Solves display abnormal problem caused by the threshold voltage shift of driving transistor 12.
And because turn off phase, driving transistor 12 work in completely switched off region, the characteristic drift of driving transistor 12 can be reduced
Shifting degree, in a frame period of display, part stage works in completely switched off region, reduces and show mura driving transistor 12
And ghost, improve display quality.
It can see from the driver' s timing shown in Fig. 4, the signal on three level signal line Vref3, which includes a pulse, to be believed
Number, pulse signal includes high level stage and low level stage；Wherein, the high level stage is as blanking voltage signal, low level
Stage is as reset signal, or the high level stage, as reset signal, the low level stage is as blanking voltage signal.High level
Stage as blanking voltage signal, the voltage in the high level stage and the first level signal on the first level signal line PVDD
Voltage control driving transistor 12 works in completely switched off region, it is therefore desirable to the magnitude of voltage in pulse signal high level stage and the
The difference of the magnitude of voltage of one level signal is more than the negative value of the threshold voltage of driving transistor 12；Or the voltage in low level stage
Value and the difference of the magnitude of voltage on the first level signal line are less than the negative value of drive transistor threshold voltage.
Referring to Fig. 5, Fig. 5 is another drive transistor characteristics curve comparison figure provided in an embodiment of the present invention.Wherein, it is special
Linearity curve 501 can represent the primary characteristic curve of driving transistor, and characteristic curve 502 and characteristic curve 503 can represent that driving is brilliant
Characteristic curve after the first characteristic drift and second of characteristic drift occurs for body pipe, and second of characteristic drift degree is higher than first
Kind of characteristic drift degree, indicatrix 504 and characteristic curve 505 be respectively driving transistor is occurred the first characteristic drift and
Second of characteristic drift carries out characteristic curve after valve value compensation.It can be seen that characteristic drift degree than it is relatively low when, mended by threshold value
The registration of characteristic curve and primary characteristic curve after repaying is higher.Image element circuit provided in an embodiment of the present invention, part-time
Section works in completely switched off region, reduces the characteristic drift degree of driving transistor, after above-mentioned valve value compensation, improves threshold
Value complement repays rear characteristic curve registration, reduces the problems such as showing mura.
Fig. 6 is another driver' s timing figure provided in an embodiment of the present invention.Referring to Fig. 6, ss1, ss2 ..., ssn difference
For represent the 1st horizontal scanning line, the 2nd horizontal scanning line ..., the signal in line n scan line, emit1, emit2 ... emitn
Represent respectively the 1st row luminous signal line, the 2nd row luminous signal line ..., the signal on line n luminous signal line.Per a line picture
Plain circuit can correspond to a horizontal scanning line and a line luminous signal line.Specification is needed, each horizontal scanning line can be with display surface
The output end electrical connection of scan drive circuit on plate, also referred to as gate driving circuit (GOA), GOA circuits are located at display panel
Non-display area, the side of the viewing area of display panel or relative both sides can be located at.GOA circuits are swept to previous row
Retouch line and scanning signal is provided, after completing charging, and then a horizontal scanning line provides scanning signal backward, is sequentially completed to each row
The charging of scan line.Each row luminous signal line can be with the output end electricity of the luminous signal drive circuit (EOA) on display panel
Connection, EOA circuits are located at the non-display area of display panel, can be located at the side or relative of the viewing area of display panel
Both sides.Wherein, the first scan line is scan line corresponding to image element circuit, and the second scan line is swept for the previous row of the first scan line
Retouch line.First luminous signal line is luminous signal line corresponding to image element circuit.Signal and the second scan line in first scan line
On signal be pulse signal, the signal in the second scan line for the signal in the first scan line preceding signal.Namely
Say that the first scanning signal is identical with the amplitude of the second scanning signal, phase is different.
It can see from the driver' s timing shown in Fig. 6, the signal on three level signal line Vref3 may include multiple arteries and veins
Punching, multiple pulses can correspond to the turn off phase of multirow image element circuit, such as the high level stage of first pulse is the first row
The turn off phase of image element circuit, the high level stage of second pulse are the turn off phase of the second row image element circuit.Can be line by line
Control image element circuit works in turn off phase in part working time section.Reduce the drift journey of driving transistor in image element circuit
Degree, improve display effect.
It can see from Fig. 4 and Fig. 6 driver' s timing, during reseting module 13 turns on, blanking voltage signal and reset
The grid of signal priority write driver transistor 12.After the grid of blanking voltage signal write driver transistor 12, drive
Dynamic transistor 12 works in completely switched off region, is needed in data write phase by the grid of data-signal write driver transistor 12
Pole, image element circuit as described in Figure 3, when writing data-signal to the grid of driving transistor 12, it is necessary to driving transistor 12
Conducting.After the grid of blanking voltage signal write driver transistor 12, the grid of reset signal write driver transistor 12,
Initialized with the grid voltage to driving transistor 12, so, in glow phase, driving transistor 12 turns on, data letter
Number can be with the grid of write driver transistor 12.
Fig. 7 is a kind of driver' s timing figure provided in an embodiment of the present invention.It is defeated with the control terminal of module with reference to Fig. 3 and 7
Module turns on when entering high level, and module turns off during the control terminal input low level of module, and driving transistor 12 is for P-type transistor
Illustrate the detailed process of the driving method of image element circuit provided in an embodiment of the present invention.
In the t11 stages, the t11 stages are reseting stage, the luminous signal write-in first on the first luminous signal line Emit1
The control terminal of the control terminal of light emitting control module 17 and the second light emitting control module 18, the first light emitting control module 17 and the second hair
Photocontrol module 18 is turned off, and the control terminal of the scanning signal write-in reseting module 13 on the second scan line S2, reseting module 13 is led
It is logical, the grid of the three level signal write driver transistor 12 on three level signal line Vref3, three level signal line
Three level signal on Vref3 is low level signal, this stage, the three level signal on three level signal line Vref3
For reset signal, the voltage of the first end of grid voltage and holding module 16 to driving transistor 12 initializes.
In the t12 stages, the t12 stages are data write phase, and reseting module 13 turns off, the scanning letter on the first scan line S1
The grid of number write-in threshold value compensation module 14, threshold value compensation module 14 turns on, the scanning signal write-in number on the first scan line S1
According to the control terminal of writing module 15, Data write. module 15 turns on, and the data-signal on data wire data passes sequentially through data and write
Enter the grid of module 15, driving transistor 12 and the write driver transistor 12 of compensating module 14, namely first node N1, driving is brilliant
The grid voltage of body pipe 12, namely first node N1 voltage gradually rise, until driving transistor 12 turns off, if data wire
The magnitude of voltage of data-signal on data is Vdata, when driving transistor 12 turns off, the grid voltage of driving transistor 12, i.e.,
First node N1 voltage V1=Vdata+Vth, wherein VthFor the threshold voltage of driving transistor 12.
In the t13 stages, the t13 stages are glow phase, and the signal on the first scan line S1 is high level, Data write. module
15 and threshold value compensation module 14 turn off, luminous signal on the first luminous signal line Emit1 writes the first light emitting control module 17
Control terminal and the second light emitting control module 18 control terminal, the first light emitting control module 17 and the second light emitting control module 18 are led
It is logical, the leakage current I of driving transistor 12d, that is, drive current through the second light emitting control module 18 driving light-emitting component 11 and light,
To realize the display function of display panel.Driving current IdMeet below equation：
It can be seen that driving current I caused by driving transistor 12dWith the threshold voltage V of driving transistor 12thIt is unrelated.
Solves display abnormal problem caused by the threshold voltage shift of driving transistor 12.
It is turn off phase in the t14 stages in stage t14, the first luminous control of signal write-in on the first luminous signal line Emit1
The control terminal of the control terminal of molding block 17 and the second light emitting control module 18, the luminous signal on the first luminous signal line Emit1
For high level, the first light emitting control module 17 and the second light emitting control module 18 turn off.Scanning signal on second scan line S2
The control terminal of reseting module 13 is write, reseting module 13 turns on, the three level signal write-in on three level signal line Vref3
The grid of driving transistor 12, it can be seen that the three level signal on three level signal line Vref3 is high level signal, this
Signal on stage three level signal line Vref3 is blanking voltage signal, the electricity of the signal on three level signal line Vref3
Pressure and section point N2 voltage make driving transistor 12 work in completely switched off region.In a frame period SS of display, bag
Turn off phase t14 is included, due to turn off phase, driving transistor 12 works in completely switched off region, can reduce driving transistor
12 characteristic drift degree, for driving transistor 12 in a frame period of display, part stage works in completely switched off region, drops
Low display mura and ghost, improve display quality.
It can be seen that in the driver' s timing shown in Fig. 7, reseting stage t11 is located at before glow phase, turn off phase
T14 is located at after glow phase t13, and in turn off phase, the first light emitting control module 17 and the second light emitting control module 18 turn off,
Reseting module 13 turns on, the grid of the blanking voltage signal write driver transistor 12 on three level signal line Vref3, data
First pole of the voltage write driver transistor on line data, namely section point, the voltage of blanking voltage signal and the second section
Point N2 voltage control driving transistor 12 works in completely switched off device.Due to turn off phase t14 be located at glow phase t13 it
Afterwards, it is necessary to by first when by the grid of the blanking voltage signal write driver transistor 12 on three level signal line Vref3
The light emitting control module 18 of light emitting control module 17 and second turns off.If this stage, the first light emitting control module 17 and the second hair
Photocontrol module 18 turns on, and the grid voltage of driving transistor 12 is to produce change, it is possible to causes flicker.This stage, will
First light emitting control module 17 and the second light emitting control module 18 turn off, and can suppress to flash.
Exemplarily, referring to Fig. 8, Fig. 8 is another driver' s timing figure provided in an embodiment of the present invention, available for the present invention
The drive circuit that any embodiment provides, unlike the driver' s timing shown in Fig. 6, for every a line image element circuit, the row
The reseting stage of image element circuit is located at before glow phase, and turn off phase SS0 is respectively positioned on after glow phase, and the 3rd level
Signal wire Vref3 signals are varied from.One frame shows that period SS includes SS1 stages and SS2 stages, and turn off phase is located at SS2
Stage.Such as the first row image element circuit, emit1 is the signal on the first luminous signal line, ss1 is in the first scan line
Signal, ss0 are the signal in the second scan line.For the second row image element circuit, emit2 is the letter on the first luminous signal line
Number, ss2 is the signal in the first scan line, and ss1 is the signal in the second scan line.It can be seen that each row image element circuit is cut
Only stage SS0 is respectively positioned on the end stage SS2 that a frame shows period SS, also, the turn off phase SS0 of each row image element circuit is equal
After the glow phase of last column image element circuit.The SS2 stages show the end stage in stage SS, turn off phase for a frame
SS0 was located in the SS2 stages, and the signal on this stage, each horizontal scanning line turns on the reseting module 13 of each row image element circuit, leads
Logical reseting module 13 is by the grid of the signal write driver transistor 12 on three level signal line Vref3, all row pixels
Circuit works in turn off phase.Such a driver' s timing, it can not have to be per the individually designed turn off phase of a line image element circuit.And
The display period of each frame, an only pulse signal on three level signal line Vref3, signal frequency is relatively low, reduces pair
The interference of other signals, and reduce load and power consumption.
It is equal in turn off phase SS0, the first light emitting control module 17 and the second light emitting control module 18 of each row image element circuit
Shut-off, the light-emitting component 11 allowed in each row image element circuit do not light, and the reseting module 13 of each row image element circuit, data write
Module 15 and threshold value compensation module 15 are both turned on, and the blanking voltage signal on three level signal line Vref3 writes each row pixel
The grid of the driving transistor 12 of circuit.Realization makes all row image element circuits work in turn off phase.Referring to Fig. 3 and Fig. 8, cutting
Only stage SS0, the luminous signal on all row luminous signal lines is high level, controls the first luminous control of each row image element circuit
The light emitting control module 18 of molding block 17 and second is turned off, and the scanning signal on all horizontal scanning lines is low level, each row
The reseting module 13 and threshold value compensation module 14 of image element circuit are both turned on, the blanking voltage letter on three level signal line Vref3
Number (high level signal in corresponding diagram 8) writes the grid of all driving transistors 12, is driven in all pixels drive circuit brilliant
Body pipe 12 works in completely switched off region.
Fig. 9 is the circuit diagram of another image element circuit provided in an embodiment of the present invention.Referring to Fig. 9, in above-described embodiment
On the basis of, Data write. module includes the first transistor M1, and threshold value compensation module includes second transistor M2, and reseting module includes
Third transistor M3, the first light emitting control module includes the 4th transistor M4, the second light emitting control module includes the 5th transistor
M5, module is kept to include the first electric capacity Cst1；
The first transistor M1 the first pole electrically connects with data wire data, the first of the second pole and driving transistor 12 extremely electric
Connection, grid electrically connect with the first scan line S1；
Second transistor M2 the first pole electrically connects with the second pole of driving transistor 12, the second pole and driving transistor 12
Grid electrical connection, grid electrically connects with the first scan line S1；
Third transistor M3 the first pole electrically connects with three level signal line Vref3, the second pole and driving transistor 12
Grid electrical connection, grid electrically connects with the second scan line S2；
4th transistor M4 the first pole electrically connects with the first level signal line PVDD, the second pole and driving transistor 12
The electrical connection of first pole, grid electrically connect with the first luminous signal line Emit1；
5th transistor M5 the first pole electrically connects with the second pole of driving transistor 12, the second pole and light-emitting component 11
The electrical connection of first pole, grid electrically connect with the first luminous signal line Emit1；
First electric capacity Cst1 the first pole electrically connects with the grid of driving transistor 12, the first electric capacity Cst1 the second pole with
First pole of driving transistor 12, namely section point N2 electrical connections；
The driving method of image element circuit provided in an embodiment of the present invention includes：
In turn off phase, third transistor M3 is turned on, and the blanking voltage signal write-in on three level signal line Vref3 is driven
The grid of dynamic transistor 12, driving transistor 12 work in completely switched off state；
In reseting stage, third transistor M3 is turned on, the electricity of reset signal write-in first on three level signal line Vref3
Hold Cst1 the first pole, the first electric capacity Cst1 is resetted；
In data write phase, the first transistor M1 and second transistor M2 conductings, the first electric capacity Cst1 the first pole is deposited
Store up the driving voltage associated with the threshold voltage of driving transistor 12；
Glow phase, the 4th transistor M5 and the 5th transistor M6 conductings, driving current caused by driving transistor 12 pass
Transport to light-emitting component 12.
In embodiments of the present invention, the first transistor M1 to the 5th transistor M5 is P-type transistor, or the first transistor
M1 to the 5th transistor M5 is N-type transistor.
Referring to Fig. 4 and Fig. 9, below with the first transistor M1, second transistor M2, third transistor M3, the 4th transistor
M4, the 5th transistor M5 and driving transistor 12 be P-type transistor exemplified by, exemplarily illustrate provided in an embodiment of the present invention
The driving method of image element circuit.
In the t1 stages, t1 stages namely turn off phase, the voltage on the first luminous signal line Emit1 is low level, the 4th
Transistor M4 and the 5th transistor M5 conductings.Signal on second scan line S2 is low level, and third transistor M3 is turned on, the 3rd
The grid of blanking voltage signal write driver transistor 12 on level signal line Vref3, blanking voltage signal are high level；By
Turned in the 4th transistor M4, first of the first level signal write driver transistor 12 on the first level signal line PVDD
Level, i.e., the source electrode of driving transistor 12, driving transistor 12 work in completely switched off region.
In the t2 stages, t12 stages namely reseting stage, the signal on the second scan line S2 is low level, third transistor
M3 is turned on, the grid of the blanking voltage signal write driver transistor 12 on three level signal line Vref3, blanking voltage signal
For low level, grid to driving transistor 12 and initialized with the first electric capacity Cst1 voltage of the first pole, under guarantee
One stage driving transistor 12 turns on, and data-signal is capable of the grid of write driver transistor 12.
In the t3 stages, t3 stages namely data write phase, the 4th transistor M4, the 5th transistor M5 and third transistor
M3 is turned off.Signal on first scan line S1 is low level, and the first transistor M1 and second transistor M2 are turned on, data wire data
On data-signal pass sequentially through the first transistor M1, driving transistor 12 and second transistor M2 write drivers transistor 12
First pole of grid and the first electric capacity Cst1, the grid voltage of driving transistor 12 gradually rise, until driving transistor 12
When grid voltage and source voltage difference are equal to the threshold voltage of driving transistor 12, driving transistor 12 turns off, driving transistor
12 grid voltage keeps constant, the grid voltage of driving transistor 12, i.e. first node N1 voltage V1=Vdata+Vth, its
Middle VdataFor the magnitude of voltage of the data-signal on data wire data, VthFor the threshold voltage of driving transistor 12.
Stage after t3, also referred to as glow phase, the first luminous signal Emit1 are low level, the 4th transistor M4 and
Five transistor M5 are turned on.Signal on first scan line S1 is high level, and the first transistor M1 and second transistor M2 are turned off, the
Three transistor M3 are also switched off.The leakage current of driving transistor 12, i.e., the luminous member of driving current driving caused by driving transistor 12
Part 11 is luminous, driving current IdMeet below equation：
It can be seen that driving current I caused by driving transistor 12dWith the threshold voltage V of driving transistor 12thIt is unrelated.
Solves display abnormal problem caused by the threshold voltage shift of driving transistor 12.And due to turn off phase t1, drive crystal
Pipe 12 works in completely switched off region, can reduce the characteristic drift degree of driving transistor 12, improves characteristic curve after compensation
Registration, reduce and show mura and ghost, improve display quality.
It should be noted that turn off phase can also be located at after glow phase, it is brilliant with first below referring to Fig. 7 and Fig. 9
Body pipe M1, second transistor M2, third transistor M3, the 4th transistor M4, the 5th transistor M5 and driving transistor 12 are P
Exemplified by transistor npn npn, exemplarily illustrate the driving method of image element circuit provided in an embodiment of the present invention.
In the t11 stages, t11 stages namely reseting stage, the signal on the first luminous signal line Emit1 is high level,
Four transistor M4 and the 5th transistor M5 shut-offs.Signal on second scan line S2 is low level, and third transistor M3 is turned on, the
The grid of reset signal write driver transistor 12 on three level signal line Vref3, reset signal is low level, brilliant to driving
The grid of body pipe 12 and initialized with the voltage of the first electric capacity Cst1 the first pole, ensure next stage driving transistor 12
Conducting, data-signal are capable of the grid of write driver transistor 12.
In the t12 stages, t12 namely data write phase, the 4th transistor M4, the 5th transistor M5 and third transistor M3
Shut-off.Signal on first scan line S1 is low level, and the first transistor M1 and second transistor M2 are turned on, on data wire data
Data-signal pass sequentially through the first transistor M1, driving transistor 12 and second transistor M2 write drivers transistor 12 grid
Pole and the first electric capacity Cst1 the first pole, the grid voltage of driving transistor 12 gradually rise, until the grid of driving transistor 12
When pole tension and source voltage difference are equal to the threshold voltage of driving transistor 12, driving transistor 12 turns off, driving transistor 12
Grid voltage keep constant, the grid voltage of driving transistor 12, i.e. first node N1 voltage V1=Vdata+Vth, wherein
VdataFor the magnitude of voltage of the data-signal on data wire data, VthFor the threshold voltage of driving transistor 12.
In the t13 stages, t13 namely glow phase, the signal on the first luminous signal line Emit1 are low level, and the 4th is brilliant
Body pipe M4 and the 5th transistor M5 conductings.Signal on first scan line S1 is high level, the first transistor M1 and the second crystal
Pipe M2 is turned off, and third transistor M3 is also switched off.The leakage current of driving transistor 12, i.e., driving current caused by driving transistor 12
Drive light-emitting component 11 luminous, driving current IdMeet below equation：
It can be seen that driving current I caused by driving transistor 12dWith the threshold voltage V of driving transistor 12thIt is unrelated.
Solves display abnormal problem caused by the threshold voltage shift of driving transistor 12.
In the t14 stages, t14 stages namely turn off phase, the signal on the first luminous signal line Emit1 is high level,
Four transistor M4 and the 5th transistor M5 shut-offs.Signal on second scan line S2 is low level, and third transistor M3 is turned on, the
The grid of blanking voltage signal write driver transistor 12 on three level signal line Vref3, blanking voltage signal are high level,
Driving transistor 12 works in completely switched off region.And because turn off phase, driving transistor 12 work in completely switched off area
Domain, can reduce the characteristic drift degree of driving transistor 12, improve characteristic curve registration after compensation, reduce show mura and
Ghost, improve display quality.
The embodiment of the present invention also provides a kind of display panel, and referring to Figure 10, Figure 10 is one kind provided in an embodiment of the present invention
The structural representation of display panel.The display panel 80 includes multiple image element circuits being arranged in array, the image element circuit bag
Include Data write. module, driving transistor, keep module and light-emitting component；
The display panel 80 also includes：
Blanking voltage generation module 81, for producing blanking voltage and transmitting to the grid of driving transistor, control driving
Transistor works in completely switched off region；Blanking voltage generation module can be clock driver, there is driving chip or corresponding
Clock driver circuit composition.
Such as image element circuit provided in an embodiment of the present invention, blanking voltage caused by blanking voltage generation module 81 passes
Three level signal line Vref3 is transported to, in turn off phase, transmits to the grid of driving transistor 12, controls driving transistor 12
Work in completely switched off region；
Scanning signal generation module 82；Led for generation scanning signal to be exported to scan line, control data writing module
It is logical；Such as can be GOA circuits, it can be made up of the multiple shift registers cascaded.
Data-signal generation module 83, for producing the data-signal of corresponding image signals and exporting to data wire, so that
The Data write. module that data-signal on data wire passes through conducting writes the grid of the driving transistor, described in control
Driving transistor provides driving current to the light-emitting component, and driving current drives the light-emitting component to light.Data-driven mould
Block can be data driver, be made up of driving chip and corresponding peripheral circuit.
The driving method for the image element circuit that any embodiment of the present invention provides, can be applied to above-mentioned display panel 80.
The embodiment of the present invention additionally provides a kind of display device, and referring to Figure 11, Figure 11 is provided in an embodiment of the present invention one
The structural representation of kind display device.The display device 90 includes the display panel 80 that any embodiment of the present invention provides.
Pay attention to, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (17)
1. a kind of driving method of image element circuit, it is characterised in that the image element circuit includes Data write. module, driving crystal
Pipe, keep module and light-emitting component；
The period is shown in a frame, the driving method includes：
Data write phase, the Data write. module write data-signal the grid of the driving transistor；
Glow phase, the grid voltage for keeping module to keep the driving transistor, the driving transistor is to the hair
Optical element provides driving current, and the light-emitting component responds the driving current and lighted；
Turn off phase, the driving transistor work in completely switched off region.
2. the driving method of image element circuit according to claim 1, it is characterised in that the driving transistor is that N-type is brilliant
Body pipe or P-type transistor；
If the driving transistor is N-type transistor, in the turn off phase, the grid and source voltage of the driving transistor
Difference is less than the negative value of its threshold voltage；It is brilliant in the turn off phase, the driving if the driving transistor is P-type transistor
Grid and the source voltage difference of body pipe are more than the negative value of its threshold voltage.
3. the driving method of image element circuit according to claim 1, it is characterised in that the turn off phase is located at the hair
After photophase and/or before the glow phase.
4. the driving method of image element circuit according to claim 1, it is characterised in that the turn off phase is shown in a frame
Ratio in period is more than zero and less than or equal to 5%.
5. the driving method of image element circuit according to claim 1, it is characterised in that the image element circuit also includes threshold value
Compensating module, reseting module, the first light emitting control module and the second light emitting control module；
Wherein, the control terminal of the Data write. module electrically connects with the first scan line, first end electrically connects with data wire, second
End electrically connects with the first pole of the driving transistor；
The control terminal of the threshold value compensation module electrically connects with first scan line, the of first end and the driving transistor
The electrical connection of two poles, the second end electrically connect with the grid of the driving transistor；
The first end for keeping module electrically connect with the grid of the driving transistor, the second end and the of the holding module
One level signal line electrically connects；
The control terminal of the first light emitting control module electrically connects with the first luminous signal line, first end is believed with first level
The electrical connection of number line, the second end electrically connect with the first pole of the driving transistor；
The control terminal of the second light emitting control module electrically connects with the first luminous signal line, first end and the driving are brilliant
The second pole electrical connection of body pipe, the second end electrically connect with the first pole of the light-emitting component；
The control terminal of the reseting module electrically connects with the second scan line, first end electrically connects with three level signal line, second
End electrically connects with the grid of the driving transistor；
Second pole of the light-emitting component electrically connects with second electrical level signal wire；
The driving method also includes reseting stage, in the reseting stage, the reseting module conducting, the 3rd level letter
Reset signal on number line writes the grid of the driving transistor；
In the data write phase, the reseting module shut-off, the Data write. module and the threshold value compensation module are led
It is logical, with the voltage that the threshold voltage of the driving transistor associates by the holding module storage；
In the glow phase, the first light emitting control module and the second light emitting control module conducting, the driving crystalline substance
Driving current caused by body pipe is transmitted to the light-emitting component.
6. the driving method of image element circuit according to claim 5, it is characterised in that on the three level signal line
Signal also includes blanking voltage signal；
In the turn off phase, the reseting module turns on, the blanking voltage signal write-in institute on the three level signal line
The grid of driving transistor is stated, the first light emitting control module turns on, the first level letter on the first level signal line
First pole of number write-in driving transistor.
7. the driving method of image element circuit according to claim 6, it is characterised in that turn on the phase in the reseting module
Between, the blanking voltage signal and the reset signal successively write the grid of the driving transistor.
8. the driving method of image element circuit according to claim 5, it is characterised in that the reseting stage is located at the hair
Before photophase, the turn off phase is located at after the glow phase, in the turn off phase, the first light emitting control mould
Block and the second light emitting control module shut-off, the reseting module turn on, the blanking voltage on the three level signal line
Signal writes the grid of the driving transistor.
9. the driving method of image element circuit according to claim 8, it is characterised in that the turn off phase of each row image element circuit
The end stage that a frame shows the period is respectively positioned on, also, the turn off phase of each row image element circuit is respectively positioned on last column pixel
After the glow phase of circuit.
10. the driving method of image element circuit according to claim 8, it is characterised in that in the turn off phase, each row picture
The the first light emitting control module and the second light emitting control module of plain circuit are turned off, and the institute of each row image element circuit
State reseting module, the Data write. module and the threshold value compensation module to be both turned on, the cut-off electricity on three level signal line
Signal is pressed to write the grid of the driving transistor of each row image element circuit.
11. the driving method of image element circuit according to claim 5, it is characterised in that the letter in first scan line
Number and second scan line on signal be pulse signal, the signal in second scan line is first scan line
On signal preceding signal.
12. the driving method of image element circuit according to claim 5, it is characterised in that on the three level signal line
Signal include at least one pulse signal, the pulse signal includes high level stage and low level stage；
Wherein, the high level stage is as the blanking voltage signal, the low level stage as the reset signal, or
The high level stage described in person, the low level stage was as the blanking voltage signal as the reset signal.
13. the driving method of image element circuit according to claim 12, it is characterised in that the voltage in the high level stage
The difference of the magnitude of voltage of value and first level signal is more than the negative value of the threshold voltage of the driving transistor；It is or described
The difference of the magnitude of voltage in low level stage and the magnitude of voltage on the first level signal line is less than the drive transistor threshold voltage
Negative value.
14. the driving method of image element circuit according to claim 5, it is characterised in that the Data write. module includes
The first transistor, the threshold value compensation module include second transistor, and the reseting module includes third transistor, and described first
Light emitting control module includes the 4th transistor, the second light emitting control module includes the 5th transistor, the holding module bag
Include the first electric capacity；
First pole of the first transistor electrically connects with the data wire, the first of the second pole and the driving transistor extremely electric
Connection, grid electrically connect with first scan line；
First pole of the second transistor electrically connects with the second pole of the driving transistor, the second pole and the driving crystal
The grid electrical connection of pipe, grid electrically connect with first scan line；
First pole of the third transistor electrically connects with the three level signal line, the second pole and the driving transistor
Grid electrical connection, grid electrically connect with second scan line；
First pole of the 4th transistor electrically connects with the first level signal line, the second pole and the driving transistor
The electrical connection of first pole, grid electrically connect with the first luminous signal line；
First pole of the 5th transistor electrically connects with the second pole of the driving transistor, the second pole and the light-emitting component
The electrical connection of the first pole, grid electrically connects with the first luminous signal line；
First pole of first electric capacity electrically connects with the grid of the driving transistor, the second pole of first electric capacity and institute
State the first pole electrical connection of driving transistor；
In the turn off phase, the third transistor turns on, described in the blanking voltage signal write-in on three level signal line
The grid of driving transistor, the driving transistor work in completely switched off state；
In the reseting stage, the third transistor turns on, described in the reset signal write-in on the three level signal line
First pole of the first electric capacity, first electric capacity is resetted；
In the data write phase, the first transistor and second transistor conducting, the first pole of the first electric capacity is deposited
Store up the driving voltage associated with the threshold voltage of the driving transistor；
Glow phase, the 4th transistor and the 5th transistor turns, driving current caused by the driving transistor
Transmit to the light-emitting component.
15. the driving method of image element circuit according to claim 14, it is characterised in that the first transistor is to described
5th transistor is P-type transistor, or the first transistor to the 5th transistor is N-type transistor.
16. a kind of display panel, it is characterised in that including multiple image element circuits being arranged in array, the image element circuit includes
Data write. module, driving transistor, keep module and light-emitting component；
The display panel includes：
Blanking voltage generation module, for producing blanking voltage and transmitting to the grid of the driving transistor, control the drive
Dynamic transistor works in completely switched off region；
Scanning signal generation module；Exported for scanning signal will to be produced to scan line, the conducting of control data writing module；
Data-signal generation module, for producing the data-signal of corresponding image signals and exporting to data wire, so that data wire
On data-signal the grid of the driving transistor is write by the Data write. module of conducting, control the driving brilliant
Body pipe provides driving current to the light-emitting component and drives the light-emitting component to light.
17. a kind of display device, it is characterised in that including the display panel described in claim 16.
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|---|---|---|---|
| CN201710937938.XA CN107481676B (en) | 2017-09-30 | 2017-09-30 | Pixel circuit driving method, display panel and display device |
| US15/912,045 US10600353B2 (en) | 2017-09-30 | 2018-03-05 | Method for driving a pixel circuit, display panel and display device |
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| CN201710937938.XA CN107481676B (en) | 2017-09-30 | 2017-09-30 | Pixel circuit driving method, display panel and display device |
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| US (1) | US10600353B2 (en) |
| CN (1) | CN107481676B (en) |
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| CN108962138A (en) * | 2018-04-04 | 2018-12-07 | 信利（惠州）智能显示有限公司 | Pixel circuit and its driving method and display device |
| CN110264954A (en) * | 2019-06-19 | 2019-09-20 | 京东方科技集团股份有限公司 | A method of adjusting pixel circuit |
| CN110827759A (en) * | 2019-11-19 | 2020-02-21 | 上海天马有机发光显示技术有限公司 | Display panel and display device |
| CN111243487A (en) * | 2020-03-18 | 2020-06-05 | 昆山国显光电有限公司 | Display panel, driving method of display panel and display device |
| CN111445858A (en) * | 2020-04-20 | 2020-07-24 | 昆山国显光电有限公司 | Pixel circuit, driving method thereof and display device |
| CN112037714A (en) * | 2020-09-14 | 2020-12-04 | 京东方科技集团股份有限公司 | Pixel circuit, driving method thereof, display panel and display device |
| CN112562591A (en) * | 2020-12-29 | 2021-03-26 | 湖北长江新型显示产业创新中心有限公司 | Pixel circuit, driving method, light-emitting control circuit, display panel and device |
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| CN111508426B (en) * | 2020-05-29 | 2022-04-15 | 京东方科技集团股份有限公司 | Pixel circuit, driving method thereof and display panel |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107481676B (en) | 2020-09-08 |
| US10600353B2 (en) | 2020-03-24 |
| US20180197458A1 (en) | 2018-07-12 |
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Effective date of registration: 20211103 Address after: No.8, liufangyuan Henglu, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: WUHAN TIANMA MICRO-ELECTRONICS Co.,Ltd. Patentee after: Wuhan Tianma Microelectronics Co.,Ltd. Shanghai Branch Address before: Room 509, building 1, No. 6111, Longdong Avenue, Pudong New Area, Shanghai, 200120 Patentee before: SHANGHAI TIANMA AM-OLED Co.,Ltd. |